Write-Host "=== NETWORK DIAGNOSTICS ===" -ForegroundColor Cyan

function Test-Step($name, $script) {
    Write-Host "`n$name..." -ForegroundColor Yellow
    try {
        & $script
    } catch {
        Write-Host "Error: $_" -ForegroundColor Red
    }
}

# 1. Network Adapter Status
Test-Step "Network Adapter Status" {
    Get-NetAdapter | Where-Object {$_.Status -ne "Disabled"} |
    Format-Table Name, Status, LinkSpeed
}

# 2. IP and DHCP
Test-Step "IP Configuration" {
    ipconfig
}

# 3. DHCP Renewal
Test-Step "Renewing DHCP" {
    ipconfig /release
    ipconfig /renew
}

# 4. Flush DNS Cache
Test-Step "Flushing DNS" {
    ipconfig /flushdns
}

# 5. Default Gateway Test
$gateway = (ipconfig | Select-String "Default Gateway").ToString().Split(":")[-1].Trim()

if ($gateway) {
    Test-Step "Ping to Gateway ($gateway)" {
        Test-Connection $gateway -Count 2
    }
}

# 6. Internet Connectivity by IP (Cloudflare)
Test-Step "Ping to Internet (1.1.1.1)" {
    Test-Connection 1.1.1.1 -Count 2
}

# 7. DNS Test
Test-Step "DNS Test (google.com)" {
    nslookup google.com
}

# 8. HTTP Test
Test-Step "HTTP Connection Test" {
    try {
        $r = Invoke-WebRequest "http://www.msftconnecttest.com/connecttest.txt" -UseBasicParsing -TimeoutSec 10
        Write-Host "HTTP OK" -ForegroundColor Green
    } catch {
        Write-Host "No HTTP access" -ForegroundColor Red
    }
}

Write-Host "`n=== ATTEMPTING TEMPORARY DNS/PROXY FIX ===" -ForegroundColor Cyan

$env:HTTPS_PROXY = $null
$env:HTTP_PROXY = $null

[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12

Write-Host "Session proxy settings cleared."

Write-Host "`n=== DONE ===" -ForegroundColor Green